Add a route in Nuxt Module

module.js

...
  this.extendRoutes((routes, resolve) => {
    const routePaths = Object.assign({
      admin: resolve(__dirname, './templates/pages/index.vue')
    })
    routes.push({
      name: 'route_name',
      path: '/' + 'route_name',
      component: routePaths.admin
    })
  })
...